./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d1535640-0e22-4b9f-83fc-4e8949ebdf18/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_d1535640-0e22-4b9f-83fc-4e8949ebdf18/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d1535640-0e22-4b9f-83fc-4e8949ebdf18/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d1535640-0e22-4b9f-83fc-4e8949ebdf18/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d1535640-0e22-4b9f-83fc-4e8949ebdf18/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d1535640-0e22-4b9f-83fc-4e8949ebdf18/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4099afe4d4ae3c88800047494721799286636d7a .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 02:58:25,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 02:58:25,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 02:58:25,920 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 02:58:25,921 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 02:58:25,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 02:58:25,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 02:58:25,946 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 02:58:25,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 02:58:25,951 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 02:58:25,953 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 02:58:25,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 02:58:25,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 02:58:25,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 02:58:25,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 02:58:25,966 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 02:58:25,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 02:58:25,969 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 02:58:25,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 02:58:25,975 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 02:58:25,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 02:58:25,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 02:58:25,986 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 02:58:25,989 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 02:58:26,001 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 02:58:26,001 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 02:58:26,002 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 02:58:26,011 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 02:58:26,012 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 02:58:26,014 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 02:58:26,014 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 02:58:26,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 02:58:26,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 02:58:26,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 02:58:26,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 02:58:26,025 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 02:58:26,026 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 02:58:26,027 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 02:58:26,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 02:58:26,029 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 02:58:26,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 02:58:26,033 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d1535640-0e22-4b9f-83fc-4e8949ebdf18/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 02:58:26,085 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 02:58:26,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 02:58:26,088 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 02:58:26,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 02:58:26,089 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 02:58:26,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 02:58:26,089 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 02:58:26,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 02:58:26,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 02:58:26,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 02:58:26,092 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 02:58:26,092 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 02:58:26,092 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 02:58:26,093 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 02:58:26,093 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 02:58:26,093 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 02:58:26,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 02:58:26,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 02:58:26,094 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 02:58:26,095 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 02:58:26,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 02:58:26,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:58:26,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 02:58:26,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 02:58:26,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 02:58:26,097 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 02:58:26,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 02:58:26,097 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 02:58:26,098 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 02:58:26,098 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_d1535640-0e22-4b9f-83fc-4e8949ebdf18/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d1535640-0e22-4b9f-83fc-4e8949ebdf18/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4099afe4d4ae3c88800047494721799286636d7a [2020-11-28 02:58:26,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 02:58:26,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 02:58:26,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 02:58:26,550 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 02:58:26,551 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 02:58:26,553 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d1535640-0e22-4b9f-83fc-4e8949ebdf18/bin/uautomizer/../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2020-11-28 02:58:26,640 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d1535640-0e22-4b9f-83fc-4e8949ebdf18/bin/uautomizer/data/969bda8fd/39ae7d290af3495f94c533d7ebd51572/FLAG1e8bf417d [2020-11-28 02:58:27,141 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 02:58:27,142 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d1535640-0e22-4b9f-83fc-4e8949ebdf18/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2020-11-28 02:58:27,154 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d1535640-0e22-4b9f-83fc-4e8949ebdf18/bin/uautomizer/data/969bda8fd/39ae7d290af3495f94c533d7ebd51572/FLAG1e8bf417d [2020-11-28 02:58:27,529 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d1535640-0e22-4b9f-83fc-4e8949ebdf18/bin/uautomizer/data/969bda8fd/39ae7d290af3495f94c533d7ebd51572 [2020-11-28 02:58:27,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 02:58:27,538 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 02:58:27,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 02:58:27,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 02:58:27,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 02:58:27,547 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:58:27" (1/1) ... [2020-11-28 02:58:27,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f5e0ca4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:27, skipping insertion in model container [2020-11-28 02:58:27,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:58:27" (1/1) ... [2020-11-28 02:58:27,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 02:58:27,586 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 02:58:27,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:58:27,923 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 02:58:27,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:58:27,999 INFO L208 MainTranslator]: Completed translation [2020-11-28 02:58:28,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:28 WrapperNode [2020-11-28 02:58:28,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 02:58:28,005 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 02:58:28,005 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 02:58:28,005 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 02:58:28,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:28" (1/1) ... [2020-11-28 02:58:28,041 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:28" (1/1) ... [2020-11-28 02:58:28,085 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 02:58:28,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 02:58:28,087 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 02:58:28,087 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 02:58:28,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:28" (1/1) ... [2020-11-28 02:58:28,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:28" (1/1) ... [2020-11-28 02:58:28,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:28" (1/1) ... [2020-11-28 02:58:28,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:28" (1/1) ... [2020-11-28 02:58:28,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:28" (1/1) ... [2020-11-28 02:58:28,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:28" (1/1) ... [2020-11-28 02:58:28,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:28" (1/1) ... [2020-11-28 02:58:28,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 02:58:28,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 02:58:28,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 02:58:28,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 02:58:28,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1535640-0e22-4b9f-83fc-4e8949ebdf18/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:58:28,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 02:58:28,241 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-28 02:58:28,241 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-11-28 02:58:28,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 02:58:28,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 02:58:28,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 02:58:28,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 02:58:28,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 02:58:28,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 02:58:28,798 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 02:58:28,798 INFO L298 CfgBuilder]: Removed 24 assume(true) statements. [2020-11-28 02:58:28,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:28 BoogieIcfgContainer [2020-11-28 02:58:28,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 02:58:28,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 02:58:28,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 02:58:28,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 02:58:28,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:58:27" (1/3) ... [2020-11-28 02:58:28,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@521ff04a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:58:28, skipping insertion in model container [2020-11-28 02:58:28,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:28" (2/3) ... [2020-11-28 02:58:28,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@521ff04a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:58:28, skipping insertion in model container [2020-11-28 02:58:28,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:28" (3/3) ... [2020-11-28 02:58:28,812 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c [2020-11-28 02:58:28,825 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 02:58:28,830 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-11-28 02:58:28,844 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-28 02:58:28,874 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 02:58:28,874 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 02:58:28,874 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 02:58:28,875 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 02:58:28,875 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 02:58:28,875 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 02:58:28,875 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 02:58:28,875 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 02:58:28,894 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-11-28 02:58:28,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 02:58:28,900 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:28,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:28,901 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:28,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:28,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1680358476, now seen corresponding path program 1 times [2020-11-28 02:58:28,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:28,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569542987] [2020-11-28 02:58:28,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:29,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569542987] [2020-11-28 02:58:29,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:58:29,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 02:58:29,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014450955] [2020-11-28 02:58:29,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 02:58:29,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:29,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 02:58:29,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 02:58:29,112 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2020-11-28 02:58:29,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:29,139 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2020-11-28 02:58:29,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 02:58:29,141 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-11-28 02:58:29,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:29,150 INFO L225 Difference]: With dead ends: 66 [2020-11-28 02:58:29,150 INFO L226 Difference]: Without dead ends: 29 [2020-11-28 02:58:29,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 02:58:29,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-28 02:58:29,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-11-28 02:58:29,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-28 02:58:29,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-11-28 02:58:29,212 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 12 [2020-11-28 02:58:29,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:29,213 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-11-28 02:58:29,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 02:58:29,213 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-11-28 02:58:29,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 02:58:29,217 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:29,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:29,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 02:58:29,218 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:29,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:29,219 INFO L82 PathProgramCache]: Analyzing trace with hash 477984840, now seen corresponding path program 1 times [2020-11-28 02:58:29,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:29,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533761079] [2020-11-28 02:58:29,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:29,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533761079] [2020-11-28 02:58:29,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:58:29,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 02:58:29,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174187396] [2020-11-28 02:58:29,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:58:29,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:29,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:58:29,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:58:29,435 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 5 states. [2020-11-28 02:58:29,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:29,682 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-11-28 02:58:29,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 02:58:29,684 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-28 02:58:29,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:29,687 INFO L225 Difference]: With dead ends: 58 [2020-11-28 02:58:29,687 INFO L226 Difference]: Without dead ends: 56 [2020-11-28 02:58:29,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-28 02:58:29,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-28 02:58:29,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 43. [2020-11-28 02:58:29,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-28 02:58:29,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-11-28 02:58:29,720 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 12 [2020-11-28 02:58:29,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:29,721 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-11-28 02:58:29,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:58:29,722 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-11-28 02:58:29,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 02:58:29,724 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:29,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:29,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 02:58:29,726 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:29,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:29,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1834568717, now seen corresponding path program 1 times [2020-11-28 02:58:29,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:29,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708832271] [2020-11-28 02:58:29,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:29,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 02:58:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:29,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708832271] [2020-11-28 02:58:29,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:58:29,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 02:58:29,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404926168] [2020-11-28 02:58:29,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:58:29,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:29,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:58:29,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:58:29,927 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 5 states. [2020-11-28 02:58:30,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:30,002 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-11-28 02:58:30,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:58:30,004 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-11-28 02:58:30,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:30,006 INFO L225 Difference]: With dead ends: 43 [2020-11-28 02:58:30,006 INFO L226 Difference]: Without dead ends: 39 [2020-11-28 02:58:30,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 02:58:30,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-28 02:58:30,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-11-28 02:58:30,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-28 02:58:30,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-11-28 02:58:30,016 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 15 [2020-11-28 02:58:30,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:30,016 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-11-28 02:58:30,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:58:30,017 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-11-28 02:58:30,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 02:58:30,018 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:30,018 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:30,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 02:58:30,018 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:30,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:30,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1641730980, now seen corresponding path program 1 times [2020-11-28 02:58:30,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:30,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236823355] [2020-11-28 02:58:30,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:30,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236823355] [2020-11-28 02:58:30,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270471489] [2020-11-28 02:58:30,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1535640-0e22-4b9f-83fc-4e8949ebdf18/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:30,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-28 02:58:30,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:30,475 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 02:58:30,486 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 02:58:30,495 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 02:58:30,498 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 02:58:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:30,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:30,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-11-28 02:58:30,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255741152] [2020-11-28 02:58:30,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 02:58:30,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:30,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 02:58:30,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-28 02:58:30,526 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 10 states. [2020-11-28 02:58:30,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:30,958 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-11-28 02:58:30,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-28 02:58:30,959 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-11-28 02:58:30,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:30,960 INFO L225 Difference]: With dead ends: 52 [2020-11-28 02:58:30,960 INFO L226 Difference]: Without dead ends: 50 [2020-11-28 02:58:30,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-11-28 02:58:30,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-28 02:58:30,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 23. [2020-11-28 02:58:30,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-28 02:58:30,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-11-28 02:58:30,969 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-11-28 02:58:30,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:30,969 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-11-28 02:58:30,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 02:58:30,970 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-11-28 02:58:30,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-28 02:58:30,971 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:30,971 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:31,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:31,185 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:31,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:31,186 INFO L82 PathProgramCache]: Analyzing trace with hash 2019916412, now seen corresponding path program 1 times [2020-11-28 02:58:31,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:31,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473362376] [2020-11-28 02:58:31,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:31,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-28 02:58:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:31,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:31,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473362376] [2020-11-28 02:58:31,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907881302] [2020-11-28 02:58:31,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1535640-0e22-4b9f-83fc-4e8949ebdf18/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:31,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:31,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 02:58:31,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:31,549 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2020-11-28 02:58:31,550 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 02:58:31,559 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 02:58:31,560 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 02:58:31,560 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:7, output treesize:6 [2020-11-28 02:58:33,626 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_1 Int)) (= (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_1) ((as const (Array Int Int)) 0))) is different from true [2020-11-28 02:58:33,735 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 02:58:33,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2020-11-28 02:58:33,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:33,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2020-11-28 02:58:33,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120419173] [2020-11-28 02:58:33,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 02:58:33,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:33,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 02:58:33,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=43, Unknown=1, NotChecked=12, Total=72 [2020-11-28 02:58:33,990 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 9 states. [2020-11-28 02:58:34,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:34,155 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-11-28 02:58:34,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 02:58:34,156 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-11-28 02:58:34,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:34,157 INFO L225 Difference]: With dead ends: 25 [2020-11-28 02:58:34,157 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 02:58:34,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=38, Invalid=97, Unknown=1, NotChecked=20, Total=156 [2020-11-28 02:58:34,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 02:58:34,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 02:58:34,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 02:58:34,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 02:58:34,159 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-11-28 02:58:34,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:34,159 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 02:58:34,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 02:58:34,160 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 02:58:34,160 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 02:58:34,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:34,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 02:58:34,617 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-28 02:58:34,639 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 02:58:34,639 INFO L274 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-11-28 02:58:34,640 INFO L274 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-11-28 02:58:34,640 INFO L274 CegarLoopResult]: For program point L7-1(lines 7 9) no Hoare annotation was computed. [2020-11-28 02:58:34,640 INFO L274 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-11-28 02:58:34,640 INFO L274 CegarLoopResult]: For program point L5-1(line 5) no Hoare annotation was computed. [2020-11-28 02:58:34,640 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-28 02:58:34,640 INFO L274 CegarLoopResult]: For program point L-1-1(line -1) no Hoare annotation was computed. [2020-11-28 02:58:34,641 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 02:58:34,641 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-28 02:58:34,641 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-11-28 02:58:34,641 INFO L277 CegarLoopResult]: At program point L53(lines 40 54) the Hoare annotation is: true [2020-11-28 02:58:34,642 INFO L270 CegarLoopResult]: At program point L47(line 47) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= .cse0 (select |#memory_int| |ULTIMATE.start_main_#t~malloc17.base|)) (= (select |#memory_int| ULTIMATE.start_main_~a~0.base) .cse0))) [2020-11-28 02:58:34,642 INFO L274 CegarLoopResult]: For program point L47-1(line 47) no Hoare annotation was computed. [2020-11-28 02:58:34,642 INFO L274 CegarLoopResult]: For program point L10(lines 10 12) no Hoare annotation was computed. [2020-11-28 02:58:34,642 INFO L274 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-11-28 02:58:34,642 INFO L274 CegarLoopResult]: For program point L8-2(line 8) no Hoare annotation was computed. [2020-11-28 02:58:34,643 INFO L277 CegarLoopResult]: At program point checkENTRY(lines 16 38) the Hoare annotation is: true [2020-11-28 02:58:34,643 INFO L274 CegarLoopResult]: For program point L29(line 29) no Hoare annotation was computed. [2020-11-28 02:58:34,643 INFO L274 CegarLoopResult]: For program point checkErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-11-28 02:58:34,643 INFO L274 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-11-28 02:58:34,643 INFO L274 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-11-28 02:58:34,644 INFO L274 CegarLoopResult]: For program point L11-2(line 11) no Hoare annotation was computed. [2020-11-28 02:58:34,644 INFO L274 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-11-28 02:58:34,644 INFO L274 CegarLoopResult]: For program point checkFINAL(lines 16 38) no Hoare annotation was computed. [2020-11-28 02:58:34,644 INFO L274 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-11-28 02:58:34,644 INFO L274 CegarLoopResult]: For program point L5-1(line 5) no Hoare annotation was computed. [2020-11-28 02:58:34,644 INFO L274 CegarLoopResult]: For program point L5-2(line 5) no Hoare annotation was computed. [2020-11-28 02:58:34,645 INFO L274 CegarLoopResult]: For program point L5-3(line 5) no Hoare annotation was computed. [2020-11-28 02:58:34,645 INFO L274 CegarLoopResult]: For program point checkErr1ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-11-28 02:58:34,645 INFO L274 CegarLoopResult]: For program point L26(lines 26 27) no Hoare annotation was computed. [2020-11-28 02:58:34,645 INFO L270 CegarLoopResult]: At program point L26-2(lines 26 27) the Hoare annotation is: (let ((.cse2 (= |check_#in~x| 0)) (.cse3 ((as const (Array Int Int)) 0))) (or (and (let ((.cse0 (<= 1 check___VERIFIER_assert_~cond)) (.cse1 (<= (+ check_~y 1) check_~n))) (or (and .cse0 .cse1 (<= 1 check_~x)) (and .cse0 .cse2 .cse1 (= check_~x 0)))) (= (select |#memory_int| check_~a.base) .cse3)) (let ((.cse4 (not (<= (+ |check_#in~y| 1) |check_#in~n|)))) (and (or .cse4 (not .cse2)) (or .cse4 (not (<= 1 |check_#in~x|))))) (not (= (select |#memory_int| |check_#in~a.base|) .cse3)))) [2020-11-28 02:58:34,646 INFO L274 CegarLoopResult]: For program point checkEXIT(lines 16 38) no Hoare annotation was computed. [2020-11-28 02:58:34,646 INFO L274 CegarLoopResult]: For program point L10(lines 10 12) no Hoare annotation was computed. [2020-11-28 02:58:34,646 INFO L274 CegarLoopResult]: For program point L10-1(lines 10 12) no Hoare annotation was computed. [2020-11-28 02:58:34,646 INFO L274 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-11-28 02:58:34,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 02:58:34 BoogieIcfgContainer [2020-11-28 02:58:34,659 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 02:58:34,659 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 02:58:34,660 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 02:58:34,660 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 02:58:34,660 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:28" (3/4) ... [2020-11-28 02:58:34,668 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 02:58:34,675 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2020-11-28 02:58:34,685 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2020-11-28 02:58:34,685 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-28 02:58:34,686 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 02:58:34,686 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 02:58:34,776 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d1535640-0e22-4b9f-83fc-4e8949ebdf18/bin/uautomizer/witness.graphml [2020-11-28 02:58:34,777 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 02:58:34,778 INFO L168 Benchmark]: Toolchain (without parser) took 7239.57 ms. Allocated memory was 90.2 MB in the beginning and 138.4 MB in the end (delta: 48.2 MB). Free memory was 56.1 MB in the beginning and 106.4 MB in the end (delta: -50.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:34,779 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 90.2 MB. Free memory was 61.6 MB in the beginning and 61.6 MB in the end (delta: 31.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:34,779 INFO L168 Benchmark]: CACSL2BoogieTranslator took 462.24 ms. Allocated memory is still 90.2 MB. Free memory was 55.9 MB in the beginning and 66.5 MB in the end (delta: -10.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:34,780 INFO L168 Benchmark]: Boogie Procedure Inliner took 81.04 ms. Allocated memory is still 90.2 MB. Free memory was 66.5 MB in the beginning and 64.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:34,782 INFO L168 Benchmark]: Boogie Preprocessor took 43.37 ms. Allocated memory is still 90.2 MB. Free memory was 64.8 MB in the beginning and 63.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:34,783 INFO L168 Benchmark]: RCFGBuilder took 670.06 ms. Allocated memory is still 90.2 MB. Free memory was 63.5 MB in the beginning and 45.9 MB in the end (delta: 17.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:34,783 INFO L168 Benchmark]: TraceAbstraction took 5856.05 ms. Allocated memory was 90.2 MB in the beginning and 138.4 MB in the end (delta: 48.2 MB). Free memory was 45.6 MB in the beginning and 109.5 MB in the end (delta: -64.0 MB). Peak memory consumption was 35.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:34,784 INFO L168 Benchmark]: Witness Printer took 117.42 ms. Allocated memory is still 138.4 MB. Free memory was 109.5 MB in the beginning and 106.4 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:34,787 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 90.2 MB. Free memory was 61.6 MB in the beginning and 61.6 MB in the end (delta: 31.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 462.24 ms. Allocated memory is still 90.2 MB. Free memory was 55.9 MB in the beginning and 66.5 MB in the end (delta: -10.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 81.04 ms. Allocated memory is still 90.2 MB. Free memory was 66.5 MB in the beginning and 64.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.37 ms. Allocated memory is still 90.2 MB. Free memory was 64.8 MB in the beginning and 63.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 670.06 ms. Allocated memory is still 90.2 MB. Free memory was 63.5 MB in the beginning and 45.9 MB in the end (delta: 17.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5856.05 ms. Allocated memory was 90.2 MB in the beginning and 138.4 MB in the end (delta: 48.2 MB). Free memory was 45.6 MB in the beginning and 109.5 MB in the end (delta: -64.0 MB). Peak memory consumption was 35.1 MB. Max. memory is 16.1 GB. * Witness Printer took 117.42 ms. Allocated memory is still 138.4 MB. Free memory was 109.5 MB in the beginning and 106.4 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 36 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.4s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 146 SDtfs, 195 SDslu, 270 SDs, 0 SdLazy, 197 SolverSat, 76 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 40 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 10 PreInvPairs, 14 NumberOfFragments, 81 HoareAnnotationTreeSize, 10 FomulaSimplifications, 8 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 107 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 125 NumberOfCodeBlocks, 125 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 118 ConstructedInterpolants, 4 QuantifiedInterpolants, 8782 SizeOfPredicates, 23 NumberOfNonLiveVariables, 321 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 2/10 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...